This repository contains the research artifacts for our USENIX Security 2025 publication, "Censorship Evasion with Unidentified Protocol Generation". The citation for the corresponding article is @inproceedings{wails:usenixsec:25, author = {Ryan Wails Rob Jansen and Aaron Johnson and Micah Sherr}, editor = {Lujo Bauer and Giancarlo Pellegrino}, title = {Censorship Evasion with Unidentified Protocol Generation}, booktitle = {Proceedings of the 34th USENIX Security Symposium}, publisher = {{USENIX} Association}, year = {2025}, } This research artifact contains [upgen.tar.bz2] the implementation of the generator component of UPGen that we used in our experiments [proteus.tar.bz2] the extended version of Proteus that includes support for UPGen-generated protocols [encrypted_tgen.tar.bz2] the encrypted-traffic generator that we used to produce traces for our experiments [psfs.tar.bz2] the Proteus PSFs that we used in our experiments [pcaps.tar.bz2] The PCAPs we used in our security experiments This version is the inital one we have submitted to the USENIX Security artifact review process. Further revisions may be uploaded to address requested functionality changes. To find the most up-to-date version of Proteus and UPGen, please visit https://github.com/unblockable.